National Science Olympiad Forum By SOF Olympiad Trainer - Page 670
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 2:

Shreyans Mondal from Sri Chaitanya Techno School Kaggadasapura Campus 1, Bengaluru
Class : Class 10

Ans 3:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
D

Ans 4:

Adhrit from CHSV, Chennai
Class : Class 8
Definitely D

Ans 5:

aditya ranjan from gyan niketan , patna
Class : Class 7
i think amount of water also nedd

Ans 6:

Medha Bijjaram from Prime Academy, Mumbai
Class : Class 9
I think D is the correct answer

Ans 7:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6

Ans 8:

Anuraaj Salunkhe from St Gregorios High School, Mumbai
Class : Class 10

Ans 9:

Aanya from DAV, Gurgaon
Class : Class 8
Option D is the correct answer

Ans 10:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7
D, amount of water matters the most out of all.

Ans 11:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 12:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4
Water is also correct

Ans 13:

Antareep Mukherjee from New Horizon Public School, Bangalore
Class : Class 8

Ans 14:

Tanmayi kiran giri from airforce force public school Vayusena Nagar, Nagpur, nagpur
Class : Class 9
I do agree it's D

Ans 15:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
All the given factors are required for a fair test ; So option D would be the correct answer

Ans 16:

Palash sachin patel from Kips, Patan
Class : Class 8
d is correct answer

Ans 17:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
The amount of water also matters right

Ans 18:

shreya from GIIS, KualaLumpur
Class : Class 5

Ans 19:

Shriyans from DPS Agra, Agra
Class : Class 8
D

Ans 20:

Shubham Ashish Kulkarni from APEEJAY PITAMPURA, DELHI
Class : Class 8
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 21:

Dhairya Vinayak from Loyola High School, Patna
Class : Class 8

Ans 22:

Rithvik from BVM Global, Chennai
Class : Class 9
d

Ans 23:

Kamal Manchenella from Delhi Public School, Hyderabad
Class : Class 7
I feel that it is D

Ans 24:

Riyan Nayak from DPS Newtown, Kolkat
Class : Class 7
c should be the correct answer

Post Your Answer

Aswath Krishna from DPS EAST, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Advay Das from Delhi Public School, Gurgaon
Class : Class 5

Ans 2:

Anika Saha from New Town School, KOLKATA
Class : Class 6
The answer is A.

Ans 3:

D Murari from Indian School of Excellence, Bangalore
Class : Class 9
C,because- it is a chemical change. after baking we can break it into smaller particles but it won't form the same clay, with same properties again

Ans 4:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru
Class : Class 6
on heating, the clay pot doesn't turn into stone,right?it doesn't change composition once heated , it is still clay ! answer is "A"

Ans 5:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
answer is a

Ans 6:

Hridhaan Talukdar from National Public School Koramangala, Bangalore
Class : Class 7

Ans 7:

RUDRAKSH BISWAS from MAYOOR PRIVATE SCHOOL, ABU DHABI
Class : Class 6
It really should be A

Ans 8:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
A is the correct answer

Ans 9:

Tanishtha from DPS, Greater Noida
Class : Class 7
c is the correct answer

Ans 10:

ATHARV RAHUL MAHAJAN from ST. STEPHENS SCHOOL CHANDIGARH, SAS NAGAR
Class : Class 6
IF WE SHARP A PENCIL IT IS A PHYSICAL IRREVERSIBLE CHANGE .SO,IF WE HEAT A POT IS PHYSICAL IRREVERSIBLE CHANGE. BUT IT COULD HAPPEN THAT THE COMPOSITION OF CLAY MIGHT CHANE BECAUSE OF HEATING AS THE MOLECULES STICK TO EACH OTHER

Ans 11:

ridhima from mdps, faridabad
Class : Class 6

Ans 12:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
C because we can get clay back from a wet pot by smashing it,but once it heats up, it dries the clay and makes it stone hard.

Ans 13:

Rasha Ranjan from DPS NOIDA , Vaishali
Class : Class 6
Yes ,Because chemical means change in the properties but there is no change .The answer is A

Ans 14:

Archisman Rout from Podar International School, Powai
Class : Class 7
A is correct because it just turns hard but it is still clay only.And also chemical change doesn't mean that it is irreversible,Chemical change means that the identity of the substance we started with is lost.Here the identity is not lost.So A is correct.

Ans 15:

Vidula Malkar from DPYA High school, Mumbai
Class : Class 7
a is the correct answer because chemical composition dose not change

Ans 16:

Arnesh from dps, delhi
Class : Class 6
It should be A

Post Your Answer

Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 8

Ans 2:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
ans is option C

Ans 3:

Harshdeep roy from Bhavans School , Nagpur
Class : Class 7
answer is option c

Ans 4:

saikrishna from bharatiya vidhya bhavans public school, Hyderabad
Class : Class 9
can someone explain why?

Ans 5:

Parshti Bajpai from Modern Public School, ALWAR
Class : Class 7
Please explain it to me.

Ans 6:

Praveen Rai from Lotus Valley International School, Noida
Class : Class 7

Ans 7:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
ans is option C

Ans 8:

Lakshya Vijeta from Afgji, New Delhi
Class : Class 8
Option D is correct. I dont know why. Please explain

Ans 9:

Aksh Swarnkar from National Center for Excellence CVR, Bangalore
Class : Class 8

Post Your Answer

Pradhyumna from J S S Public School, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
Not kerwa its kewra. It is an extract that is distilled from the flower of the Pandanus plant. Kewra water is very similar to rosewater. It is used to flavour South Asian cuisine.

Ans 2:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
jk kj;

Post Your Answer

SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it will be maximum near the ground

Ans 2:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
As it goes up,kinetic energy decreases due to gravity while potential energy increases with height. As it comes down, kinetic energy increases due to gravity while potential energy decreases.

Post Your Answer

SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it will be maximum near the ground

Post Your Answer

Prasuk Jain from Modern Delhi Public School, Faridabad
Subject :NSO    Class : Class 7

Saurabh burned two different fibres X and Y in order to identify them. X smelt like burning paper while Y smelt like burning hair. Which of the following options correctly identifies the two fibres?


Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 2:

Aksh singh from The asian school, Dehradun
Class : Class 7

Ans 3:

Aparajita Biswas from Don Bosco School Silchar, SILCHAR
Class : Class 7
THE CORRECT ANS IS OPTION C

Ans 4:

Ishaan Roy from Sri Chaitanya Techno School, Bengaluru
Class : Class 10

Post Your Answer

Pulkit Gupta from Maxfort School, New Delhi
Subject :NSO    Class : Class 6

Ans 1:

Videh Jain from Bluebells School International, Delhi
Class : Class 6
d is the ans

Ans 2:

Arsh from Lahs, Gwalior
Class : Class 3
ans is d sof !!!!!!!!!!!!! ans is d

Ans 3:

Anika Saha from New Town School, KOLKATA
Class : Class 6
ANS IS D

Ans 4:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
Answer is D

Ans 5:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Answer is d

Ans 6:

khushi Joshi from Svkm , Mumbai
Class : Class 10
Ans is D as air is all of the above

Ans 7:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
D is the ans as air is matter and is very transparent.

Ans 8:

ARAMINTA SAHA from VIBGYOR HIGH BALEWADI, PUNE
Class : Class 6
ans is d because it is transparent which allows light to pass, it doesn't observe light but transmits all light

Ans 9:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
sof the answer is ddd so many times i am really fed up of your wrong answers and that is really very shamful on you.

Ans 10: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 11:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
Answer is D as air it neither absorbs or reflects light,its almost transparent,it transmits the whole of light.

Ans 12:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7
CHILL PPL CHILL

Ans 13:

arnav santosh shinde from new english school , landewadi
Class : Class 4
ANS IS D

Ans 14:

AJAY LAHOTI from SPRINGDALES DUBAI, Dubai
Class : Class 6
I should be d

Ans 15:

Karthik from Euro, Bengaluru
Class : Class 7
ans is d

Ans 16:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
@ashwak control your language

Ans 17:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 18:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is D

Ans 19:

niuv from meridian, Hyderabad
Class : Class 6
ANS IS D

Ans 20:

Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Class : Class 9
I think its D not B

Ans 21:

Aarav Garg from DPS Greater Noida, Greater Noida
Class : Class 7
It should be d but they are telling its b.

Ans 22:

Parth Kaushish from MDPS, Faridabad
Class : Class 6
its D come on two total mistakes in one test

Ans 23:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
The answer is 'D' option, 'All of the above'. It is so because Air is not visible because it neither absorbs nor reflects light, it transmits whole of light. Dust particles in air is visible as they reflect light. Air is almost transparent substance. It is not dust to be visibile. It is air, it is completely transparent.

Ans 24:

Mitra Maiti from Techno India Group Public School, Bolpur Prantik
Class : Class 6
It is true that air is a perfectly transparent object. It neither absorbs nor reflects light. It transmits whole of light. So, all the options are correct and answer is D.

Ans 25:

Agrim Jai from Modern Bharakhamba, Delhi
Class : Class 7
D

Ans 26:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
i agree with d

Ans 27:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7

Ans 28:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
these days sof olympiad trainer has gone mad. in one test, i got 4 perfectly wrong question . and now this . this adds up to fivei do not know what is the problemans should be ddddddddd!!!!!

Ans 29:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 30:

Naisha from Brilliant public school b, Bilaspur
Class : Class 8
D

Ans 31:

Devdarsh hero from HOLY GRACE, Mala
Class : Class 6
ans is D

Ans 32:

Thejaswini from Rajagiri, Chennai
Class : Class 7

Ans 33:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 34:

kpks14 from RIMT World School, Chandigarh
Class : Class 7
d is the answer but the trainer is showing b as answer air reflects light that is why the sky is blue

Ans 35:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 36:

Shruti Rajshree from NPS Indiranagar, Bengaluru
Class : Class 3
answer is B as given in the answers. there is a solution too

Ans 37:

Advik from DPS Patna, Patna
Class : Class 4
its got to be ddddd!!

Ans 38:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Explain this dumb question and an even dumber answer " Master Answer"

Ans 39:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
THE ANSWER IS D

Ans 40:

Ishayu Mukherjee from Don Bosco Park Circus, Kolkata
Class : Class 6
The answer is wrong. The correct answer is D

Ans 41:

malhar thorve from city internqtional school, satara road, pune
Class : Class 7

Ans 42:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
I agree with everyone is Satwik because air trasparent it neither reflects nor absorbs light and trasmits whole of light So ans is D

Ans 43:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 7
And is b

Ans 44:

Ashwak from Cambridge, Jalandhar
Class : Class 9
What in the freaking world . I am surprised that these dumb idiots can even host international and national olympiads . Even a 5 year old could get the answer right . I won't be surprised if they give the answer 22 of the question 2 2 . I am telling you we are wasting money on these damn question papers

Ans 45:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
i mean except Satwik

Ans 46:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
ans is d

Ans 47:

Siddharth from DPS, Jodhpur
Class : Class 9
The correct answer should be option D, All of these

Post Your Answer

Swati from Ryan, Bengaluru
Subject :NSO    Class : Class 8

Ans 1:

chepz from abc school, pandikkad
Class : Class 10
The common error is to think that pressure at 0.4h above the surface of the reservoir of mercury is 0.4 times the atmospheric pressure. The pressure at p is caused by the weight of mercury above point P. Thus preesure at P is equal to : 0.6x 100000 = 60000 Pa

Ans 2:

sk from psbb millennium school, Chennai
Class : Class 9

Ans 3:

Harsh Kant from Gyan Ganga Educational Academy, Raipur
Class : Class 9

Ans 4:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
answer is b

Ans 5:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 6:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
everybody just copy and paste it, can anyone explain in an easier way

Ans 7:

Gokul Warrier M from SRI KUMARANS MALLASANDRA, BANGALORE
Class : Class 9

Ans 8: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

Ans 9:

Sumedha Mishra from xyz, School, Pune
Class : Class 8

Post Your Answer

Mihir Arora from dpsg, ghaziabad
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Ans 2:

Malav patel from Navrachana school sama , Vadodara
Class : Class 5
A is the correct answer as 1 and 2 are correct

Post Your Answer

X Y
(A) Wool Silk
(B) Cotton Rayon
(C) Cotton Silk
(D) Silk Wool